Nut-lock.



J. BYSTROM.

NUT LOCK.

APPLIOATION FILED MAY 8,1914.

Patented N ov. 3, 1914.

rON. D L.

sacarse i @PATENT sermon.;

JOHN BYSTROlVI, OF CHICAGO, ILLINOIS, ASSIGNR `O1? ONE-HALF TO GEORGE W. KUEI-IL, 0F CHICAGO, ILLINOIS. p

NUT-LOCK.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Application led May 8, 1914. Serial N0. 837,295. i

To all whom t may concern: ,i

Be it known that I, JOHN BYsTRoM, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Nut-Locks, of which the following is a description, reference being had to the accolfnpanying` drawings, forming a part of this specification, in which corresponding numerals of reference in the different figures indicate like parts.

The primary object of my invention is to provide a simple, cheap and effective nutlock which shall be so constructed as to automatically lock a nut in a tightened position upon a bolt as a direct result of tightening said nut.

A further object is to so construct said locking device that it may be compressed to the utmost upon tightening the nut without abnormal stress upon, orbreakage of the locking members and without straightening said members so as to cause them to lie in a plane parallel to that of the face of the nut, or in other words, forcing said members out of engaging angles to the planes of the respective surfaces with which they are intended to contact.

To these ends, my invention consists in the combination of elements hereinafter more particularly described and definitely pointed out in the claims.

In the drawings, Figure l is a view of a bolt and nut together with a nut-locking de-` vice embodying my invention, said parts being shown in the respective positions which they should assume when in use, the parts secured thereby being shown in sectionA Fig. 2 is a face view of the locking disk or member. Fig. 3 is a face view of one of the washers associated with said locking disk in its preferred form. Fig. t is a like View of the opposite washer. Fig. 5 is an edge view of the locking disk and washers as they would appear when assembled for use. Fig. 6 is a sectional view thereof taken upon the line G, Fig. 2, viewed in the direction of the arrow there shown. Fig. 7 is a view corresponding to that indicated in Fig. 5, showing the application thereof to serrated surfaces. Fig. S is a face view of a part of the surface to be clamped, showing radial serrations or notches for the reception of one of the locking teeth, and Fig. 9 is anl edge View of a modified form of` locking device made in two pieces.

While the locking device may be made in two or more pieces, I prefer to make it in three pieces which I will now describe.

Referring to the drawings, a Fig. l, indicates `an ordinary bolt, b an ordinary nut, and c ci respectively, members adapted to be held together thereby. Intel-posed between the nut b and the parts c, is my improved nut-lock, which preferably is made up of three annular members, viz.: a central locking disk generally designated by e, and tWo washers designated respectively byf and g.

The disk c and the two washers are each provided with corresponding bores or perforations z., for the reception of rivets Fig. 6, by means of which the parts are rigidly attached to each other. The washer f, is provided with a peripheral cut-away portion y', while the washer g, has a like cutA away portion 71:, the same being differently located with respect to the relative position in the two washers of the openings z., the purpose of which arrangement will be prescntly7 stated.

The `disk a is preferably formed from steel havinga spring temper and cuts Z are formed therein, substantially concentric with its axis, so as to provide spring locking members or detents m, n, which are bent in opposite directions with respect to each other as shown, so that the ends o, 7), which are knife edged, may stand normally in planes outside of and adjacent to the washers g, f, as clearly shown in F igs. 5 and 6.

It will be noted that the construction described possesses important advantages. A reference to Fig. l will show that while the detents are fully compressed, they each stand at an angle to the plane of the surface engaged thereby and hence each is sure to bite the metal with which it contacts, so as to prevent the unscrewing of the nut; and no matter how firmly the nut is screwed or pressed against the main body of the device, of which the washers f g form a part, the detente m, n, cannot be straightened by such pressure, and therefore cannot be broken as would be likely to occur with such short members, especially when made thick enough to exert the requisite tension to cause the knife edges to engage the adjacent metal.

lt is obvious that were the disk e-used without the washers or without a body thicker than the detents, the latter would be completely attened by the pressure of 5 the nut- This would either result in preventing` a locking action whether the detents were broken or not and, if broken, ifzhere would be no way of determining the act.

rlhe surfaces adapted to be engaged by the detente may be either smooth or notched as preferred. In Figs. 7 and 8 l have shown the compressed member g, provided with radial notches o", and the nut s, with like l5 notches or indentations t. These, as shown in the drawing, are greatly exaggerated in width and depth over what l should prefer to employ, inasmuch as a very slight indentation, would be ample for the purpose intended. i do not wish to be limited to the exact construction shown inasmuch as it may be varied Without departing from the spirit of the invention, as set forth in the claims annexed; nor do l wish to be confined to the composite locking member made up of three pieces although it possesses advantages in that the washers may be made of any kind of sheet metal while the disk may be ystamped from sheet steel having the desired temper or the .disks may be tempered after having `been stamped.

ln Fig. 9 il have shown a modified construction formed from two pieces u o, the body portion w being represented by the combined thickness of said pieces which are riveted or otherwise rigidly attached to each other. The part u has a detent :c bent through va peripheral notch in the part fv, and the part o, which is reversed with re- Ai0 spect to its fellow, has a .corresponding detent -y extending through fa similar not-ch.

An important Aadvantage of yeither construction is that it enables `the nut to be released when desired by forcing a wedge between the detent and nut, when the latter may be ,unscrewed of Vsaid members, resilient detents bent in opposite directions obliquely to the plane of said body to extend beyond its respective outer faces, said detents being formed outside of a continu-ous ring portion surrounding said lcentral opening, a portion of .the peripheryof said members being cut away to provide space for said detente.

3. A nut-lock comprising a structure formed from a plurality of disk-like members rigidly Aattached to each other, each having ya lcentral opening to receive a bolt, the thickness of the body of said structure being represented by the combined thiol*- ness of said members, said structure being provided with resilient detente bent in opposite directions obliquely to the plane of said body, each detent being formed by notching the periphery of the member upon which it is formed and shearing said member concentrically in a line lbetween the .central opening therein and the periphery for a predetermined distance from said notch.

ln testimony whereof, .l have signed this speciiication in the presence of two subscribing witnesses, this fifth day of May,

JOHN 'BYSTROhL 1ili'tnesses Devin H. FLETCHER, Gno. WV. KUEHL.

Copies of this patent may ne obtained for ive cents each, by addressing vthe Commissioner of Patents,

Washington, D. 0; 

